<!DOCTYPE html>
<html lang="zh-CN">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>033-一个feColorMatrix滤镜</title>
</head>

<body>
    <svg xmlns="http://www.w3.org/2000/svg" version="1.1">
        <defs>
            <linearGradient id="MyGrad" gradientUnits="userSpaceOnUse" x1="100" y1="0" x2="500" y2="0">
                <stop offset="0" style="stop-color:#ff00ff" />
                <stop offset=".33" style="stop-color:#88ff88" />
                <stop offset=".67" style="stop-color:#2020ff" />
                <stop offset="1" style="stop-color:#d00000" />
            </linearGradient>
            <filter id="Matrix">
                <feColorMatrix type="matrix" values="1 0 0 0 0  0 1 0 0 0  0 0 1 0 0  0 0 0 1 0" />
            </filter>
            <filter id="Saturate">
                <feColorMatrix type="saturate" values="0.4" />
            </filter>
            <filter id="HueRotate">
                <feColorMatrix type="hueRotate" values="90" />
            </filter>
            <filter id="Luminance">
                <feColorMatrix type="luminanceToAlpha" result="a" />
                <feComposite in="SourceGraphic" in2="a" operator="in" />
            </filter>
        </defs>
        <g style="font-size:50;fill:url(#MyGrad)">
            <text x="50" y="60">Unfiltered</text>
            <text x="50" y="120" filter="url(#Matrix)">Matrix</text>
            <text x="50" y="180" filter="url(#Saturate)">Saturate</text>
            <text x="50" y="240" filter="url(#HueRotate)">HueRotate</text>
            <text x="50" y="300" filter="url(#Luminance)">Luminance</text>
        </g>
    </svg>
</body>

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